题目：

Carbon Dots Anchored on Octahedral CoO as a Stable Visible-Light-Responsive Composite Photocatalyst for Overall Water Splitting

作者：

Weilong Shi,^ab Feng Guo,^ac Cheng Zhu,^a Huibo Wang,^a Hao Li,^a Hui Huang,^a* Yang Liu^a* and Zhenhui Kang^a*

单位：

^aJiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China.

^bSchool of Physics, Huazhong University of Science and Technology, Wuhan430074, P.R. China.

^cKey Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environmental Science and Engineering, Chang’an University, Xi’an 710064, P.R. China.

摘要：

Photocatalytic overall water splitting using particulate semiconductors is a potential means of storing solar energy in using intermittency of sunlight as a primary source of power and zero emission of carbon dioxide. Herein, we constructed a composite material with carbon dots (CDs) anchored on the surface of octahedral CoO as a high-efficiency and long-term stable photocatalyst for overall water splitting under visible light irradiation (λ > 400 nm). The structure and morphology of CDs/CoO composite were investigated by a series of characterization methods. The obtained CDs/CoO composites exhibit more-efficient visible light absorption than pure CoO did, leading to higher photocatalytic activity for overall water splitting. The optimized photocatalytic H₂ and O₂ production were achieved for CDs/CoO composite with the content of 5wt.% CDs (5% CDs/CoO), showing H₂ (O₂) evolution rate of 1.67 μmol/h (0.91 μmol/h) with the expected 2:1 stoichiometry, which is up to 6 times as high as that of pristine CoO. Additionally, 5% CDs/CoO composite also shows outstanding photocatalytic stability for over 15 cycling experiments. This enhanced photocatalytic activity and outstanding stability in CDs/CoO composites could be ascribed to several merits of CDs that not only improved charge separation efficiency and visible-light absorption but also effectively conducted heat generated by photo-thermal effect of CoO.

影响因子：

8.867

分区情况：

一区

链接：

http://pubs.rsc.org/en/content/articlepdf/2017/TA/C7TA06077G